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Communication channels with suppression cores

a communication channel and suppression core technology, applied in the field of communication channels, can solve the problems of high frequency noise of anext and afext, communication cables and between nearby communication cables, and the lik

Inactive Publication Date: 2007-11-27
PANDUIT
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In high-speed data networks, crosstalk can result within communication cables and between nearby communication cables.
ANEXT and AFEXT become more problematic at frequencies above 300 MHz, and ANEXT and AFEXT noise at high frequencies is present in high-speed data transmission systems such as 10 Gigabit Ethernet signaling.

Method used

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  • Communication channels with suppression cores
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  • Communication channels with suppression cores

Examples

Experimental program
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Embodiment Construction

[0029]ANEXT and AFEXT can result from unbalanced coupling between conductive pairs in a connector. In a twisted-pair channel with eight conductors, the conductors may be paired as follows:[0030]Pair 1=fourth and fifth conductors;[0031]Pair 2=first and second conductors;[0032]Pair 3=third and sixth conductors; and[0033]Pair 4=seventh and eighth conductors.

[0034]For example, in a twisted-pair channel in which pair 3 (the 3-6 pair, corresponding to the third and sixth conductors in an eight-conductor channel) is a crossover pair, being divided and placed on opposite sides of the central pair 1 in a connector, the coupling between pair 2 (i.e., the 1-2 pair) and the third conductor in the connector is greater than the coupling between pair 2 and the sixth conductor. Similarly, the coupling between pair 4 (i.e., the 7-8 pair) and the sixth conductor in a connector is greater than the coupling between pair 4 and the third conductor. Installing suppression cores, such as ferrite suppressio...

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Abstract

Alien crosstalk suppression cores are used to decrease alien crosstalk in communications channels. Electrical communication cables may be provided with alien crosstalk suppression cores. The alien crosstalk suppression cores, which may be ferrite suppression cores, are placed separately on some or all of the twisted pairs within a communication cable. The alien crosstalk suppression cores reduce ANEXT and AFEXT in high-frequency communications when communication cables are installed near one another. Alien crosstalk suppression cores may also be incorporated into other communication channel components, such as on a PCB within a communication jack.

Description

CROSS-REFERENCE TO RELATED APPLICATION[0001]This application claims the benefit of U.S. Provisional Application No. 60 / 645,412, filed Jan. 19, 2005 and entitled “Communication Channels with Suppression Cores.”FIELD OF THE INVENTION[0002]The present invention is generally directed to communication channels and more specifically directed to communication channels having alien crosstalk suppression cores.BACKGROUND OF THE INVENTION[0003]Communication cables comprised of multiple twisted pairs of conductors are common, with four-pair cables being widely used. In high-speed data networks, crosstalk can result within communication cables and between nearby communication cables. Crosstalk occurring within a cable includes near-end crosstalk (NEXT) and far-end crosstalk (FEXT), and alien crosstalk occurring between cables includes alien near-end crosstalk (ANEXT) and alien far-end crosstalk (AFEXT). Suppression of alien crosstalk in communication channels is important, because alien crossta...

Claims

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Application Information

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Patent Type & Authority Patents(United States)
IPC IPC(8): H01B11/06
CPCH01B11/16H01R13/6461H01R13/6463
Inventor BOLOURI-SARANSAR, MASUDDYLKIEWICZ, DAVIDREIGLE, DARREN
Owner PANDUIT